fix(rename): second review pass on the package rename

- The post-task reclaim skip recognises the legacy application.* embed name,
  so query embeds queued by the previous release do not pay a full collect.
- The Azure compose file mounts host data on /app/{indexes,inputs,vectors},
  where the process actually reads and writes; it mounted /app/application/...
  before the rename and /app/docsgpt/... after it, and nothing wrote to either.
- The offline image check triggers on docsgpt/requirements*.txt again;
  dependabot's pip entry points at docsgpt/.
- install_hint() and its docstring name docsgpt/requirements-<extra>.txt;
  the test asserts the full path.
- application/vectors/ stays ignored: the compose files still mount it.
- The durability QA script quiets the docsgpt logger tree.
- Upgrade note: the three renamed source-sync entries start their timers
  from the upgrade.

.github/workflows/docker-image-verify.yml

@@ -11,7 +11,7 @@ on:
       - 'docsgpt/Dockerfile'
       - '.dockerignore'
       - 'application/**'
-      - 'application/requirements*.txt'
+      - 'docsgpt/requirements*.txt'
       - 'docsgpt/scripts/prefetch_models.py'
       - 'docsgpt/scripts/verify_offline.py'
       - 'docsgpt/vectorstore/model_registry.py'